Resetting 850 GLT 20V 93 Trip computer - Page 6

charlotte001 · Aug 17th, 2009, 11:40

When I move it to the furthest position [Speed] It will not show an accurate speed according the speedo then it is very slow to return to zero.

Move to the next position [average fuel] it shows firstly disc for a brief second then 99.9

Next position [actual fuel] 99.9

Next Temp always shows 2 degrees above ambient if I stop in traffic it rises to 41 c then drops slowly [very slowly]

Next miles that seems to be 2 lower than the odemeter

Next is Fuel left on warning lamp this has a mind of its own has been known to tell me I have 1100 miles left when the orange light comes on [which I believe is 8 litres +/-.

Ok Ill remove the top and have a look see

charlotte001 · Aug 21st, 2009, 17:54

After a lot of lengthy sessions with various meters and monitors it turns out that the actual digital drivers computer has gone into default mode and now needs resetting, Volvo still stock the computer but no longer stock the connection lead, which apparently has to be fitted to the newer computer unit why no idea.

there is no way to read the codes off the unit which is really annoying just a replacement. Does anyone know if there is a way to make the lead up [especially any experts with electronics] who could suggest a way of unlocking it?

Aug 17th, 2009, 11:40	#51
charlotte001 Premier Member Last Online: Jul 26th, 2012 11:13 Join Date: Jul 2009 Location: norwich	trip computer When I move it to the furthest position [Speed] It will not show an accurate speed according the speedo then it is very slow to return to zero. Move to the next position [average fuel] it shows firstly disc for a brief second then 99.9 Next position [actual fuel] 99.9 Next Temp always shows 2 degrees above ambient if I stop in traffic it rises to 41 c then drops slowly [very slowly] Next miles that seems to be 2 lower than the odemeter Next is Fuel left on warning lamp this has a mind of its own has been known to tell me I have 1100 miles left when the orange light comes on [which I believe is 8 litres +/-. Ok Ill remove the top and have a look see __________________ Previous Volvos:850 GLT 2.5 20V Auto Saloon Silver. 1997 850 T-5 Auto Estate Nautic Blue Chipped ECU, V70 TCV, Carbon Cased Filter, 17inch alloys, Rattling Engine masking the suspension rattles. Engine doesn't rattle anymore

Aug 21st, 2009, 17:54	#52
charlotte001 Premier Member Last Online: Jul 26th, 2012 11:13 Join Date: Jul 2009 Location: norwich	Update time on the trip computer After a lot of lengthy sessions with various meters and monitors it turns out that the actual digital drivers computer has gone into default mode and now needs resetting, Volvo still stock the computer but no longer stock the connection lead, which apparently has to be fitted to the newer computer unit why no idea. there is no way to read the codes off the unit which is really annoying just a replacement. Does anyone know if there is a way to make the lead up [especially any experts with electronics] who could suggest a way of unlocking it? __________________ Previous Volvos:850 GLT 2.5 20V Auto Saloon Silver. 1997 850 T-5 Auto Estate Nautic Blue Chipped ECU, V70 TCV, Carbon Cased Filter, 17inch alloys, Rattling Engine masking the suspension rattles. Engine doesn't rattle anymore

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